JP5447953B2 - Paper feeding device and image forming apparatus - Google Patents
Paper feeding device and image forming apparatus Download PDFInfo
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- JP5447953B2 JP5447953B2 JP2009290809A JP2009290809A JP5447953B2 JP 5447953 B2 JP5447953 B2 JP 5447953B2 JP 2009290809 A JP2009290809 A JP 2009290809A JP 2009290809 A JP2009290809 A JP 2009290809A JP 5447953 B2 JP5447953 B2 JP 5447953B2
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Description
本発明は、積載されたシート束から記録紙を分離、搬送させる給紙装置と、これを備えた画像形成装置に関する。 The present invention relates to a paper feeding device that separates and conveys recording paper from a stack of stacked sheets, and an image forming apparatus including the paper feeding device.
従来、複写機などの画像形成装置に用いる給紙装置においては、給紙カセットまたは給紙トレイ内の底板上に積載された用紙を１枚ずつ捌いて給紙する場合、給紙に先立って用紙を用紙上方に設けられた給紙ローラ（またはピツクアツプローラ）に圧接させる（即ち、底板を上昇させる）ことが必要である。 2. Description of the Related Art Conventionally, in a paper feeding device used in an image forming apparatus such as a copying machine, when papers stacked on a bottom plate in a paper feeding cassette or a paper feeding tray are fed one by one, the paper is fed prior to paper feeding. Must be brought into pressure contact with the paper feed roller (or pick up roller) provided above the paper (that is, the bottom plate is raised).
この底板上昇方式には、特許文献１に開示されているように、底板を昇降することにより分離部に対し平行に紙を移動し、分離部と紙の距離を一定にすることにより、紙の枚数に関係なく安定した給紙を可能とするものがある。ただし、この方式は、底板をとめているために専用モータが必要であり、モータ軸に負担がかかるという問題がある。 In this bottom plate raising method, as disclosed in Patent Document 1, the paper is moved in parallel with the separation unit by raising and lowering the bottom plate, and the distance between the separation unit and the paper is made constant, thereby There are some that enable stable paper feeding regardless of the number of sheets. However, this method has a problem that a dedicated motor is required because the bottom plate is fixed, and a load is applied to the motor shaft.
また特許文献２には、底板を歯欠けギアワンターンによって昇降させる機構が開示されている。ギアの止め部材はつめをひっかけるものであるが、爪によって底板をとめているため耐久性に問題がある。 Patent Document 2 discloses a mechanism for raising and lowering the bottom plate by a toothless gear one turn. The gear stop member catches a pawl, but there is a problem in durability because the bottom plate is fastened by a claw.
すなわち、モータによって底板を上昇させる方式はカセットまたはトレイの装着力あるいは取出力が重くなり、操作性が低下する欠点があったスプリング加圧方式よりも優れた方式であるが、構成が複雑になり、コストがアップするなどのデメリットが存在する。よってコストダウンのため底板上昇の専用モータを撤去するワンターンギアを用いた方式が存在するが、本来なら駆動によって支えている底板を支える別の機構が必要である。 In other words, the method of raising the bottom plate by the motor is superior to the spring pressurization method, which has the disadvantage that the mounting force or output of the cassette or tray becomes heavy and the operability is reduced, but the configuration becomes complicated. There are disadvantages such as increased costs. Therefore, there is a method using a one-turn gear for removing the dedicated motor for raising the bottom plate for cost reduction, but another mechanism for supporting the bottom plate that is originally supported by driving is required.
従来の技術には、ラックとピニオンにより底板を上昇させピニオンを固定することによって底板を支えているものがあるが、ラックの固定をトレイ側で行なっており、底板上昇はできるが下降には別の機構が必要である。またトレイを抜いてすぐに底板が下降しないため給紙ローラと紙の摩擦による紙へのダメージも懸念される。また、固定部材に給紙トレイに紙が２５０枚積載された状態であれば約２５Ｎの力がかかるため固定方法によっては耐久性の問題が懸念される。 In some conventional technologies, the bottom plate is supported by raising the bottom plate with the rack and pinion and fixing the pinion, but the rack is fixed on the tray side, and the bottom plate can be raised, but it is separate from the lowering. This mechanism is necessary. Further, since the bottom plate does not descend immediately after the tray is pulled out, there is a concern about damage to the paper due to friction between the paper feed roller and the paper. Further, if 250 sheets of paper are stacked on the paper feed tray on the fixing member, a force of about 25 N is applied, and there is a concern about the durability problem depending on the fixing method.
また従来技術としてソレノイドやウォームギアなどによる電装部品や駆動によりラックが定位置に来たことをセンサで検知して固定する方法もあるが、コストがアップしてしまう、構成が複雑になるなどのデメリットが生じる。 In addition, as a conventional technology, there is an electrical component such as a solenoid or worm gear, or a method of detecting and fixing that the rack has reached a fixed position by driving, but there are disadvantages such as increased cost and complicated configuration Occurs.
本発明は、底板の固定と底板下降を駆動機構にたよらずに確実に固定と下降を行うことができる底板上昇機構を備えた給紙装置と、これを用いた画像形成装置を提供することを目的とする。 The present invention provides a sheet feeding device including a bottom plate raising mechanism capable of reliably fixing and lowering the bottom plate and fixing the bottom plate without using a drive mechanism, and an image forming apparatus using the same. Objective.
本発明の給紙装置のうち請求項１に係るものは、
用紙を積載する給紙トレイ内に、用紙をセットする底板と、該底板を昇降するために底板下方位置に設けられて回動する押し上げ部材と、該押し上げ部材に連結された加圧アームと、該加圧アームに連結した加圧スプリングと、該加圧スプリングに連結したラックと、該ラックを移動させるピニオンギアと、該ピニオンギアに連結した欠歯ギアと、該欠歯ギアに駆動を伝える駆動ギアと、前記欠歯ギアを抑制するソレノイドとを有する底板上昇機構を備えた給紙装置において、
前記底板上昇後に前記ラックの位置を固定可能とする固定部材を、前記給紙トレイを装着する被装着装置側に設けてなり、
前記被装着装置側に配する固定部材が、
前記ラックを案内する傾斜部と、
該ラックを止める部分と、
該ラックが及ぼす力を支える部分と、
該ラックによって移動した状態から定位置に戻るためのスプリングを取り付ける部分とを有し、
前記ラックが、前記固定部材の前記ラックを止める部分と係脱可能な一つの穴を有し、
前記固定部材が、前記ラックが及ぼす力よって該ラックの移動方向に対して垂直に直線移動して、前記固定部材の前記ラックを止める部分が前記ラックの前記穴に係脱する、
ことを特徴とする。
Among the sheet feeding devices of the present invention, the one according to claim 1 is
A bottom plate for setting paper in a paper feed tray for stacking paper, a push-up member that is provided at a lower position of the bottom plate for rotating the bottom plate, and a pressure arm connected to the push-up member; A pressure spring connected to the pressure arm, a rack connected to the pressure spring, a pinion gear for moving the rack, a toothless gear connected to the pinion gear, and driving to the toothless gear In a paper feeding device having a bottom plate raising mechanism having a drive gear and a solenoid for suppressing the missing gear,
A fixing member to allow fixing the position of the rack after the bottom plate rises, Ri Na provided in the mounting apparatus for mounting said tray,
The fixing member arranged on the mounted device side is
An inclined portion for guiding the rack;
A portion for stopping the rack;
A portion supporting the force exerted by the rack;
A portion for attaching a spring for returning to a fixed position from the state moved by the rack;
The rack has one hole that can be engaged with and disengaged from a portion of the fixing member that stops the rack;
The fixing member linearly moves perpendicularly to the moving direction of the rack by the force exerted by the rack, and the portion of the fixing member that stops the rack engages and disengages from the hole of the rack.
It is characterized by that.
請求項２に係るものは、請求項１の給紙装置において、
用紙を積載する給紙トレイ内に、用紙をセットする底板と、該底板を昇降するために底板下方位置に設けられて回動する押し上げ部材と、該押し上げ部材に連結された加圧アームと、該加圧アームに連結した加圧スプリングと、該加圧スプリングに連結したラックと、該ラックを移動させるピニオンギアと、該ピニオンギアに連結した欠歯ギアと、該欠歯ギアに駆動を伝える駆動ギアと、前記欠歯ギアを抑制するソレノイドとを有する底板上昇機構を備えた給紙装置において、
前記底板上昇後に前記ラックの位置を固定可能とする固定部材を、前記給紙トレイを装着する被装着装置側に設けてなり、
前記被装着装置側に配する固定部材が、
前記ラックを案内する傾斜部と、
該ラックを止める部分と、
該ラックが及ぼす力を支える部分と、
該ラックによって移動した状態から定位置に戻るためのスプリングを取り付ける部分とを有し、
前記ラックが、前記固定部材の前記ラックを止める部分と係脱可能な一つの穴を有し、
前記固定部材が、前記ラックが及ぼす力によって回動して、前記固定部材の前記ラックを止める部分が前記ラックの前記穴に係脱する、
ことを特徴とする。
According to a second aspect of the present invention, in the paper feeding device of the first aspect,
A bottom plate for setting paper in a paper feed tray for stacking paper, a push-up member that is provided at a lower position of the bottom plate for rotating the bottom plate, and a pressure arm connected to the push-up member; A pressure spring connected to the pressure arm, a rack connected to the pressure spring, a pinion gear for moving the rack, a toothless gear connected to the pinion gear, and driving to the toothless gear In a paper feeding device having a bottom plate raising mechanism having a drive gear and a solenoid for suppressing the missing gear,
A fixing member capable of fixing the position of the rack after the bottom plate is raised is provided on a mounted device side on which the paper feed tray is mounted;
The fixing member arranged on the mounted device side is
An inclined portion for guiding the rack;
A portion for stopping the rack;
A portion supporting the force exerted by the rack;
A portion for attaching a spring for returning to a fixed position from the state moved by the rack;
The rack has one hole that can be engaged with and disengaged from a portion of the fixing member that stops the rack;
The fixing member is rotated by a force exerted by the rack, and a portion of the fixing member that stops the rack is engaged with and disengaged from the hole of the rack.
It is characterized by that.
請求項３に係る画像形成装置は、請求項１または２に記載の給紙装置を搭載したことを特徴とする。
An image forming apparatus according to a third aspect includes the paper feeding device according to the first or second aspect.
本発明によれば、簡単な機構により、コストの安い、しかもカセットまたはトレイの操作性が低下しない底板上昇機構を備えた給紙装置と、画像形成装置を提供できる。 According to the present invention, it is possible to provide an image forming apparatus and an image forming apparatus that are provided with a bottom plate raising mechanism that is low in cost and does not deteriorate the operability of a cassette or tray by a simple mechanism.
本発明は、本体側にラック部材を止める部材を取り付けることで、底板上昇後にラック部材を止め、そのことで底板を固定し、給紙トレイが抜かれることで自動的に底板を下げるのであるが、このような動作を駆動力を用いることなく簡易な構成で作ることを可能としたものである。 In the present invention, a member for stopping the rack member is attached to the main body side, so that the rack member is stopped after the bottom plate is raised, thereby fixing the bottom plate, and the bottom plate is automatically lowered by removing the paper feed tray. Such an operation can be made with a simple configuration without using a driving force.
例えばラック部材とは別方向に直線移動するラック固定部材に傾斜部、ラック固定部、ラック部材に受ける力を支える部分、ばね部材を取り付けることによって、ラック部材が移動しているときはスムーズにラック固定部材が押し下げられ、ラック部材が定位置にくるとばねによって確実にラック固定部材がラック部材を固定する部分まで移動し、ラック部材を固定する。ラック部材に受ける力を支える部分、ばね部材を取り付けることによって、ラック部材が固定された後、ラック部材に受ける力を支える部分を、壁に接触させることでラック固定部材が破損することなく確実にラック部材を固定する。 For example, by attaching an inclined part, a rack fixing part, a part that supports the force received by the rack member, and a spring member to a rack fixing member that moves linearly in a direction different from the rack member, the rack member can be smoothly moved when the rack member is moving. When the fixing member is pushed down and the rack member comes to a fixed position, the rack fixing member is surely moved to the portion where the rack member is fixed by the spring, and the rack member is fixed. By attaching the spring member to the part that supports the force received by the rack member, the rack fixing member can be securely damaged by bringing the part that supports the force received by the rack member into contact with the wall after the rack member is fixed. Fix the rack member.
図１は、本発明の実施対象に係る給紙装置と画像形成装置の概要を示す図である。給紙トレイ１００は複写機等の画像形成装置の装置本体１（被装着装置）の正面（Ａ面）より出し入れ可能である（フロントローデイング給紙トレイ方式）。装置本体１内には給紙ローラ装置２（後述するピックアップローラ４、フイードローラ５、セパレートローラ６）が設けられ、給紙トレイ内に収容された用紙３は図中の矢印Ｂ方向に給送される。 FIG. 1 is a diagram showing an outline of a sheet feeding device and an image forming apparatus according to an embodiment of the present invention. The paper feed tray 100 can be taken in and out from the front (surface A) of the apparatus main body 1 (attached apparatus) of an image forming apparatus such as a copying machine (front loading paper feed tray system). A sheet feeding roller device 2 (a pickup roller 4, a feed roller 5, and a separation roller 6 described later) is provided in the apparatus main body 1, and the sheet 3 accommodated in the sheet feeding tray is fed in the direction of arrow B in the figure. The
給紙装置の分離搬送について図２を参照して説明する。図中４は給紙トレイ１００の上部で給送側に固設され、給送時、最上用紙に圧接してこれを送出するピックアップローラ、５、６は用紙の重送を防止するためのフイードローラとセパレートローラである。 Separation and conveyance of the sheet feeding device will be described with reference to FIG. In the figure, reference numeral 4 is an upper part of the paper feed tray 100 fixed to the feeding side, and at the time of feeding, a pick-up roller that presses and feeds the uppermost paper, and 5, 6 are feed rollers for preventing double feeding of the paper And a separate roller.
給紙トレイについて図３を参照して説明する。給紙トレイ１００は、上方が開放された箱形状のトレイ本体１０５、トレイ本体底面に設けられた底板１０１、一対のサイドフェンス１０２、１０３、エンドフェンス１０４により構成されている。 The paper feed tray will be described with reference to FIG. The paper feed tray 100 includes a box-shaped tray main body 105 that is open at the top, a bottom plate 101 provided on the bottom surface of the tray main body, a pair of side fences 102 and 103, and an end fence 104.
底板１０１は支軸１０１ａ、１０１ｂを支点として上下に回動可能に設けられ、この底板１０１上には用紙３が積載される。支軸１０１ｂは給紙トレイ１００の奥側に位置づけられ、底板１０１は手前側（底板１０１上から給紙される用紙３の給紙方向前方側）が上下方向へ移動するよう回動することにより、底板１０１上に積載された用紙３の給紙方向先端側がピックアップローラ４に押し当てられる（図２、図３参照）。 The bottom plate 101 is provided so as to be pivotable up and down with the support shafts 101a and 101b as fulcrums, and the sheets 3 are stacked on the bottom plate 101. The support shaft 101b is positioned on the back side of the paper feed tray 100, and the bottom plate 101 is rotated so that the front side (the front side in the paper feeding direction of the paper 3 fed from the bottom plate 101) moves up and down. The leading end side of the sheet 3 stacked on the bottom plate 101 is pressed against the pickup roller 4 (see FIGS. 2 and 3).
サイドフェンス１０２、１０３は、底板１０１上に積載された用紙３の横幅方向（給紙方向と直行する方向）に沿ってスライド可能に設けられている。スライドしたサイドフェンス１０２、１０３が用紙３の側面に当接され、用紙３の積載位置が位置決めされる。サイドフェンス１０２、１０３はラックギア１０６とピニオンギア１０７とにより連結され、互いに接離する方向へ同じ寸法ずつスライドする。 The side fences 102 and 103 are provided so as to be slidable along the horizontal width direction (direction orthogonal to the paper feeding direction) of the paper 3 stacked on the bottom plate 101. The slid side fences 102 and 103 are brought into contact with the side surface of the sheet 3, and the stacking position of the sheet 3 is positioned. The side fences 102 and 103 are connected by a rack gear 106 and a pinion gear 107, and slide by the same size in a direction in which the side fences 102 and 103 come in contact with and away from each other.
エンドフェンス１０４は、底板１０１上に積載された用紙３の縦幅方向（給紙方向）に沿ってスライド可能に設けられている。スライドしたエンドフェンス１０４が用紙３の後端に当接され、用紙３の積載位置が位置決めされる。エンドフェンス１０４は１ｍｍ程度のラッチ（図示せず）によって連結され、エンドフェンス１０４が１ラッチずつ移動する。 The end fence 104 is provided so as to be slidable along the vertical width direction (paper feeding direction) of the sheets 3 stacked on the bottom plate 101. The slid end fence 104 is brought into contact with the rear end of the sheet 3, and the stacking position of the sheet 3 is positioned. The end fence 104 is connected by a latch (not shown) of about 1 mm, and the end fence 104 moves by one latch.
図４（Ａ）を参照して給紙トレイに取り付けられる底板上昇機構を説明する。またトレイ本体１０５の底部に底板１０１を下方から押し上げる加圧アーム１０８と押し上げ部材を固定している加圧軸１０９が設けられている。加圧軸の延長線上には更に加圧アーム１０８が固定されている。加圧アーム１０８には加圧スプリング１１１の一端が取り付けられ、他端には給紙トレイ１００に取り付けられたラック部材１１２が取り付けられている。ラック部材１１２は給紙トレイ１００に取り付けられたピニオンギア１１３により水平移動し所定の位置にくると、ピニオンギアは装置本体１に取り付けられたラック固定部材１１４によって固定される。 With reference to FIG. 4A, the bottom plate raising mechanism attached to the paper feed tray will be described. A pressure arm 108 that pushes up the bottom plate 101 from below and a pressure shaft 109 that fixes the push-up member are provided at the bottom of the tray body 105. A pressure arm 108 is further fixed on the extension line of the pressure shaft. One end of a pressure spring 111 is attached to the pressure arm 108, and a rack member 112 attached to the paper feed tray 100 is attached to the other end. When the rack member 112 is horizontally moved by a pinion gear 113 attached to the paper feed tray 100 and reaches a predetermined position, the pinion gear is fixed by a rack fixing member 114 attached to the apparatus main body 1.
図４（Ｂ）を参照して底板上昇機構の動作について説明する。なお装置本体１からの駆動伝達は別途記載する。
ピニオンギア１１３が回転し、ラック部材１１２が移動（Ｘ方向に移動）し、加圧スプリング１１１により加圧アーム１０８が回転し、底板１０１が支軸１０１ａ、１０１ｂを中心に回転し上昇し、ピックアップローラ２に底板１０１上の用紙３を押し付ける。
The operation of the bottom plate raising mechanism will be described with reference to FIG. The drive transmission from the apparatus main body 1 will be described separately.
Pinion gear 1 13 rotates, the rack member 112 is moved (moved in the X direction), the pressure arm 108 is rotated by the pressure spring 111, bottom plate 101 is shaft 101a, and rotates around the 101b increases, The paper 3 on the bottom plate 101 is pressed against the pickup roller 2.
またラック部材１１２が矢印Ｘ方向に移動し、ラック固定部材１１４を回転させ、ラック固体部材１１４がラック部材１１２の凹んでいる溝１１２aに入り込み、ピニオンギア１１３の回転がフリー（欠け歯ギア１１６との連結解消）となり、ラック部材１１２が矢印Ｘとは逆方向に移動（加圧スプリング１１１により）し、ラック固体部材１１４と接触して停止する。
The rack member 112 moves in the arrow X direction, a rack fixing member 114 is rotated, the rack solid member 114 enters the groove 112a that is recessed in the rack member 112, the rotation of the pinion gear 1 13 is free (missing teeth gear 116 And the rack member 112 moves in the direction opposite to the arrow X (by the pressurizing spring 111) and comes into contact with the rack solid member 114 and stops.
図５を参照して装置本体１における駆動伝達、すなわち給紙トレイ装着のピニオンギア１１３への駆動伝達を説明する。装置本体１に欠け歯ギア１１６が回転可能に取り付けられている。欠け歯ギア１１６にはスプリング１１５が取り付けられ他方は装置本体１に取り付けられる。欠け歯ギア１１６は、スプリング１１５により矢印方向に所定の力で回転させられる。装置本体１にフラッパソレノイド１１７がネジ止めされ、フラッパ部１１９は欠け歯ギア１１６のストッパ部に引っ掛けられており、欠け歯ギア１１６はフラッパ部１１９により回転を停止する。
Referring to drive transmission in the apparatus main body 1 to FIG. 5, i.e., illustrating the drive transmission to the feeding tray mounting of the pinion gear 1 13. A chip gear 116 is rotatably attached to the apparatus body 1. A spring 115 is attached to the chipped gear 116 and the other is attached to the apparatus main body 1. The chipped gear 116 is rotated by a spring 115 with a predetermined force in the direction of the arrow. The flapper solenoid 117 is screwed to the apparatus body 1, the flapper part 119 is hooked on the stopper part of the chipped gear 116, and the chipped gear 116 stops rotating by the flapper part 119.
図５により駆動伝達の動作を説明する。フラッパソレノイド１１７に通電し、フラッパ部１１９が本体に吸着（下方向に回転移動）し、フラッパ部１１９が欠け歯ギア１１６のストッパから外れる。するとスプリング１１５により欠け歯ギア１１６が回転し、駆動ギア１１８に噛み込む。それと同時にピニオンギア１１３にも噛み込む。駆動ギア１１８により欠け歯ギア１１６が回転し、ピニオンギア１１３が回転し、所定時間経過後にフラッパソレノイド１１７への通電がオフすると、欠け歯ギア１１６のストッパ部材がフラッパ部１１９に引っかかり、欠け歯ギア１１６が停止する（１回転後）。なお駆動ギア１１８は、図示しないモータにより反時計方向に回転する。また、駆動ギア１１８は常時駆動でも問題はない。 The drive transmission operation will be described with reference to FIG. The flapper solenoid 117 is energized, the flapper part 119 is attracted to the main body (rotates downward), and the flapper part 119 is removed from the stopper of the chipped gear 116. Then, the toothless gear 116 is rotated by the spring 115 and is engaged with the drive gear 118. At the same time, the pinion gear 113 is also bitten. When the chip gear 116 is rotated by the drive gear 118, the pinion gear 113 is rotated, and the energization to the flapper solenoid 117 is turned off after a predetermined time has elapsed, the stopper member of the chip gear 116 is caught by the flapper portion 119, and the chip gear. 116 stops (after one rotation). The drive gear 118 is rotated counterclockwise by a motor (not shown). Further, there is no problem even if the drive gear 118 is always driven.
給紙動作のフローを説明する。
（１）ユーザーは、記録紙を給紙トレイ１００をセットし給紙トレイ１００を装置本体１に挿入する。
（２）給紙トレイ１００を装着すると図示しないトレイ検知スイッチあるいはセンサがオンとなり、装置本体１は給紙トレイ１００が装着したことを認識する。
（３）給紙準備動作を開始する。
（４）図示しないモータを回転させて駆動ギア１１８を回転させ、フラッパソレノイド１１７に１秒間通電する。
（５）フラッパソレノイド１１７がオンとなることで上術のごとく欠け歯ギア１１６が１回転する間にラック部材１１２が移動して底板１０１が上昇し、ピックアップローラ４に接触する。ラック部材１１２は装置本体１に取り付けられているラック固定部材１１４により固定される。
（６）これで給紙準備動作が完了する。
（７）給紙動作は、給紙命令により給紙ローラ装置２が駆動して記録紙を分離し、搬送する。
（８）記録紙を交換または補給する。
（９）給紙トレイ１００を引き出す。
（１０）装置本体１に取り付けられているラック固定部材１１４がラック部材１１２からはずれ、加圧スプリング１１１によって引っ張られ、底板が下がる（初期位置）。
（１１）ユーザーは、記録紙を交換又は補給し、上述した（１）の動作を行う。
A flow of sheet feeding operation will be described.
(1) A user sets a paper feed tray 100 with recording paper and inserts the paper feed tray 100 into the apparatus main body 1.
(2) When the paper feed tray 100 is installed, a tray detection switch or sensor (not shown) is turned on, and the apparatus body 1 recognizes that the paper feed tray 100 is installed.
(3) The paper feed preparation operation is started.
(4) The motor (not shown) is rotated to rotate the drive gear 118, and the flapper solenoid 117 is energized for 1 second.
(5) When the flapper solenoid 117 is turned on, the rack member 112 is moved while the chip gear 116 is rotated once as in the above operation, and the bottom plate 101 is raised and contacts the pickup roller 4. The rack member 112 is fixed by a rack fixing member 114 attached to the apparatus main body 1.
(6) This completes the paper feed preparation operation.
(7) In the paper feeding operation, the paper feeding roller device 2 is driven by a paper feeding command to separate and transport the recording paper.
(8) Replace or supply the recording paper.
(9) Pull out the paper feed tray 100.
(10) The rack fixing member 114 attached to the apparatus main body 1 is detached from the rack member 112 and pulled by the pressure spring 111, and the bottom plate is lowered (initial position).
(11) The user replaces or replenishes the recording paper and performs the operation (1) described above.
このような動作の場合、底板１０１が上昇し、ラック部材１１２がラック固定部材１１４に固定された場合、ラック固定部材１１４に記録紙の積載量にもよるが２５０枚程度の場合約２５Ｎの力がかかってしまう。また確実にラック部材１１２の溝にラック固定部材１１４を入れないと底板が固定できなくなる。本実施例では確実にラック部材１１２が固定でき耐久性のあるラック固定部材１１４が実現できる。 In such an operation, when the bottom plate 101 is raised and the rack member 112 is fixed to the rack fixing member 114, a force of about 25 N is applied to the rack fixing member 114 depending on the amount of recording paper loaded, but about 250 sheets. It will take. In addition, the bottom plate cannot be fixed unless the rack fixing member 114 is securely inserted into the groove of the rack member 112. In this embodiment, the rack member 112 can be reliably fixed, and the durable rack fixing member 114 can be realized.
図６に示すラック固定部材１２０について説明する。図７は、図４を上部から見た図を示す。図７（ａ）に示すように、ラック固定部材１２０を傾斜部１２３、ラック固定部分１２４、ラック固定部材１２０がラック部材１１２に及ぼす力を支える部分１２５をもち、ラック固定部材１２０はラックの移動方向とは垂直に直線移動する。ラック固定部材１２０は給紙トレイ１００の奥に配置された壁１２１に空けられた穴から給紙トレイ１００側に出ており、初期状態では支える部分１２５が壁に対接している。 The rack fixing member 120 shown in FIG. 6 will be described. FIG. 7 shows a view of FIG. 4 as viewed from above. As shown in FIG. 7A, the rack fixing member 120 has an inclined portion 123, a rack fixing portion 124, and a portion 125 that supports the force that the rack fixing member 120 exerts on the rack member 112. The rack fixing member 120 moves the rack. It moves linearly perpendicular to the direction. The rack fixing member 120 protrudes toward the paper feed tray 100 from a hole formed in the wall 121 disposed in the back of the paper feed tray 100, and a supporting portion 125 is in contact with the wall in the initial state.
ラック部材１１２が矢印方向に移動すると図６（ｂ）のように傾斜部１２３によってラック固定部材１２０が下方に移動し、ラック部材１１２の溝がくるとスプリング１２２によって初期位置に戻りラック部材１１２が固定される。このように傾斜部１２３を設けることで確実にラック固定部材１２０が押し下げられ、ラック部材１１２の穴がくると確実にラック部材１１２を固定できる。
When the rack member 112 moves in the direction of the arrow, the rack fixing member 120 is moved downward by the inclined portion 123 as shown in FIG. 6B, and when the rack member 112 is grooved, the rack member 112 is returned to the initial position by the spring 122. Fixed. By providing the inclined portion 123 in this way, the rack fixing member 120 is surely pushed down, and the rack member 112 can be reliably fixed when the rack member 112 has a hole .
また、図８に示すラック固定部材１３０について説明する。図９は図２を上部から見た図である。図９に示すように、ラック固定部材１３０がラック部材１１２に及ぼす力を支える部分１３５をもち、ラック固定部材１３０は軸１３７を中心に回動する。ラック固定部材１３０は給紙トレイ１００の奥に配置された壁１２１に支える部分で初期状態では対接している。 The rack fixing member 130 shown in FIG. 8 will be described. FIG. 9 is a top view of FIG. As shown in FIG. 9, the rack fixing member 130 has a portion 135 that supports the force exerted on the rack member 112, and the rack fixing member 130 rotates about a shaft 137. The rack fixing member 130 is a portion supported by a wall 121 disposed in the back of the paper feed tray 100 and is in contact with the rack fixing member 130 in the initial state.
ラック部材１１２が矢印方向に移動すると図９（ｂ）のように傾斜部１３３をラック部材１１２が押すことによって回動し、ラック部材１１２の溝がくると、壁１２１とラック固定部材１３０に取り付けられた突起１３６に取り付けられたねじりスプリング１３２によって初期位置に戻りラック部材１１２が固定される。このように傾斜部１３３を設けることによって確実にラック部材１１２がラック固定部材１３０を回動させ、ラック部材１１２の穴がくると確実にラック部材１１２を固定できる、また壁と面によってラック部材１１２から受ける力を支えるため、破損することなくラック部材１１２を固定できる。
When the rack member 112 moves in the direction of the arrow, the rack member 112 is rotated by pushing the inclined portion 133 as shown in FIG. 9B. When the rack member 112 has a groove, the rack member 112 is attached to the wall 121 and the rack fixing member 130. The rack member 112 is fixed to the initial position by the torsion spring 132 attached to the projection 136. By providing the inclined portion 133 in this manner, the rack member 112 can reliably rotate the rack fixing member 130, and the rack member 112 can be reliably fixed when the hole of the rack member 112 comes. In order to support the force received from the rack member 112, the rack member 112 can be fixed without being damaged.
１：画像形成装置の装置本体
２：給紙ローラ装置
３：用紙
４：ピックアップローラ
５：フイードローラ
６：セパレートローラ
１００：給紙トレイ
１０１：底板
１０１ａ、１０１ｂ：底板の支軸
１０２、１０３：サイドフェンス
１０４：エンドフェンス
１０５：トレイ本体
１０６：ラックギア
１０７：ピニオンギア
１０８：加圧アーム
１０９：加圧軸
１１１：加圧スプリング
１１２：ラック部材
１１２ａ：ラック部材の溝
１１３：ピニオンギア
１１４：ラック固定部材
１１６：欠け歯ギア
１１５：スプリング
１１７：フラッパソレノイド
１１８：駆動ギア
１１９：フラッパ部
１２０：ラック固定部材
１２１：壁
１２３：傾斜部
１２４：ラック固定部分
１２５：力を支える部分
１３０：ラック固定部材
１３２：スプリング
１３３：傾斜部
１３５：力を支える部分
１３６：突起
１３７：軸
1: Image forming apparatus main body 2: Paper feed roller device 3: Paper 4: Pickup roller 5: Feed roller 6: Separating roller 100: Paper feed tray 101: Bottom plate 101a, 101b: Bottom plate support shafts 102, 103: Side fence 104: End fence 105: Tray body 106: Rack gear 107: Pinion gear 108: Pressure arm 109: Pressure shaft 111: Pressure spring 112: Rack member 112a: Rack member groove 113: Pinion gear 114: Rack fixing member 116 : Chipped gear 115: spring 117: flapper solenoid 118: drive gear 119: flapper part 120: rack fixing member 121: wall 123: inclined part 124: rack fixing part 125: part supporting force 130: rack fixing member 132: spring 133: Inclined part 135: The supporting portion 136: protrusion 137: Axis
Claims (3)
前記底板上昇後に前記ラックの位置を固定可能とする固定部材を、前記給紙トレイを装着する被装着装置側に設けてなり、
前記被装着装置側に配する固定部材が、
前記ラックを案内する傾斜部と、
該ラックを止める部分と、
該ラックが及ぼす力を支える部分と、
該ラックによって移動した状態から定位置に戻るためのスプリングを取り付ける部分とを有し、
前記ラックが、前記固定部材の前記ラックを止める部分と係脱可能な一つの穴を有し、
前記固定部材が、前記ラックが及ぼす力よって該ラックの移動方向に対して垂直に直線移動して、前記固定部材の前記ラックを止める部分が前記ラックの前記穴に係脱する、
ことを特徴とする給紙装置。 A bottom plate for setting paper in a paper feed tray for stacking paper, a push-up member that is provided at a lower position of the bottom plate for rotating the bottom plate, and a pressure arm connected to the push-up member; A pressure spring connected to the pressure arm, a rack connected to the pressure spring, a pinion gear for moving the rack, a toothless gear connected to the pinion gear, and driving to the toothless gear In a paper feeding device having a bottom plate raising mechanism having a drive gear and a solenoid for suppressing the missing gear,
A fixing member to allow fixing the position of the rack after the bottom plate rises, Ri Na provided in the mounting apparatus for mounting said tray,
The fixing member arranged on the mounted device side is
An inclined portion for guiding the rack;
A portion for stopping the rack;
A portion supporting the force exerted by the rack;
A portion for attaching a spring for returning to a fixed position from the state moved by the rack;
The rack has one hole that can be engaged with and disengaged from a portion of the fixing member that stops the rack;
The fixing member linearly moves perpendicularly to the moving direction of the rack by the force exerted by the rack, and the portion of the fixing member that stops the rack engages and disengages from the hole of the rack.
A paper feeder characterized by that.
前記底板上昇後に前記ラックの位置を固定可能とする固定部材を、前記給紙トレイを装着する被装着装置側に設けてなり、
前記被装着装置側に配する固定部材が、
前記ラックを案内する傾斜部と、
該ラックを止める部分と、
該ラックが及ぼす力を支える部分と、
該ラックによって移動した状態から定位置に戻るためのスプリングを取り付ける部分とを有し、
前記ラックが、前記固定部材の前記ラックを止める部分と係脱可能な一つの穴を有し、
前記固定部材が、前記ラックが及ぼす力によって回動して、前記固定部材の前記ラックを止める部分が前記ラックの前記穴に係脱する、
ことを特徴とする給紙装置。 A bottom plate for setting paper in a paper feed tray for stacking paper, a push-up member that is provided at a lower position of the bottom plate for rotating the bottom plate, and a pressure arm connected to the push-up member; A pressure spring connected to the pressure arm, a rack connected to the pressure spring, a pinion gear for moving the rack, a toothless gear connected to the pinion gear, and driving to the toothless gear In a paper feeding device having a bottom plate raising mechanism having a drive gear and a solenoid for suppressing the missing gear,
A fixing member capable of fixing the position of the rack after the bottom plate is raised is provided on a mounted device side on which the paper feed tray is mounted;
The fixing member arranged on the mounted device side is
An inclined portion for guiding the rack;
A portion for stopping the rack;
A portion supporting the force exerted by the rack;
A portion for attaching a spring for returning to a fixed position from the state moved by the rack;
The rack has one hole that can be engaged with and disengaged from a portion of the fixing member that stops the rack;
The fixing member is rotated by a force exerted by the rack, and a portion of the fixing member that stops the rack is engaged with and disengaged from the hole of the rack.
A paper feeder characterized by that.
An image forming apparatus comprising the paper feeding device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009290809A JP5447953B2 (en) | 2009-12-22 | 2009-12-22 | Paper feeding device and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009290809A JP5447953B2 (en) | 2009-12-22 | 2009-12-22 | Paper feeding device and image forming apparatus |
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| JP2011131961A JP2011131961A (en) | 2011-07-07 |
| JP5447953B2 true JP5447953B2 (en) | 2014-03-19 |
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| JP2009290809A Expired - Fee Related JP5447953B2 (en) | 2009-12-22 | 2009-12-22 | Paper feeding device and image forming apparatus |
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| JP3224867B2 (en) * | 1992-08-07 | 2001-11-05 | 株式会社リコー | Paper feeder |
| JP2001253562A (en) * | 2000-03-10 | 2001-09-18 | Ricoh Co Ltd | Sheet feeder and image forming device |
| JP4701091B2 (en) * | 2006-01-19 | 2011-06-15 | 株式会社リコー | Paper feeding device and image forming apparatus |
| JP2008265930A (en) * | 2007-04-18 | 2008-11-06 | Kyocera Mita Corp | Paper feeder and image forming device provided with this |
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